Along with distortion and delay, the wah-wah is part of the Holy Trinity of classic guitar effects. Invented by accident in the 1960s, the wah-wah can make a guitar sing, laugh, cry and scream like human being. Its a powerful effect thats helped take solos by Hendrix, Clapton and a thousand guitarists since to the highest echelons of classic rockdom. Now, T-Rex introduces the Gull Wah, their own interpretation of the wah-wah legend. Two wahs and the long-forgotten yoy Many of the wah-wah pedals produced over the decades are very different from each other. And then there are related effects like the underrated (we think) yoy-yoy pedal. When we designed Gull, we wanted to bring you the very best that history has to offer and then some. Gull gives you two distinct wah-wah sounds a light wah thats great for clean guitars and rhythm parts and a heavy, smoking wah for distorted leads plus the unique dual-filter yoy-yoy effect. Yoy-yoy is a basically a wah effect with an ultra-high-frequency sweep soaring overhead. Its an incredibly rich sound. A classic SLOPE knob lets you shape the character of your way/yoy sweep, and a BOOST function lets you set a higher volume for your output signal when you kick your Gull into action. A more musical wah The Gull addresses a complaint many guitarists have with traditional wah-wah pedals: their response. Wah-wahs often jump into action at the slightest touch, leaving little room to work the pedal and build up slowly. Gull addresses this with a special HOTSPOT button that gives you the option of slowing the onset of the effect and using the whole pedal to wah with. It makes Gull respond more like a musical instrument than many legacy pedals do. The Wah to end all Wahs. Traditional Wah pedals come with an expiration date at some point you need to substitute the pot due to wear and tear. The Gull Wah from T-Rex is different. Its equipped with a long lasting magnetic field sensor system. In practice this system is noise-free and eliminates additional maintenance over time. Simply put: The Gull Wah is built to last and lastand last!Pedal controller (on/off) Mode switch: Wah 1 Wah 2 Yoy Slope knob Boost knob Hotspot button Battery Type: 9 V battery 6F22 Battery Life: 4 to 6 hours External connectors: Input Jack, Output Jack, 9V DC Jack